Section 1
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A spring of negligible mass with a spring constant of 200 N/m is stretched 0.2 m. How much potential energy is stored in the spring?
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Cards (100)
Section 1
(50 cards)
A spring of negligible mass with a spring constant of 200 N/m is stretched 0.2 m. How much potential energy is stored in the spring?
4 J
What is the average velocity of a car that travels 30 kilometers due west in 0.50 hours?
60 km/hr west
9. The uniform motion of a cart is shown in the distance versus time graph. What is the average speed of the cart?
2 m/s
A 400 newton girl standing on a dock exerts a force of 100 newtons on a 10000 newton sailboat as she pushes it away from the dock. How much force does the sailboat exert on the girl?
100 N
A football player kicks a ball with an initial velocity of 25 meters per second at an angle of 53 degrees above the horizontal. The vertical component of the initial velocity of the ball is
20 m/s
A bowling ball was dropped from the same height and at the same time that a softball was thrown horizontally. Neglecting air resistance, which statement is true?
The bowling ball and softball hit the ground at the same time
The strong force is the force of
attraction between nucleons
An object with a mass of 10 kg is moving at a speed of 5 m/s. The kinetic energy of the mass is
125 joules
A mosquito flying over a highway strikes the windshield of a moving truck. Compared to the magnitude of the force of the truck on the mosquito during the collision, the magnitude of the force of the mosquito on the truck is
the same
32. Two students are pushing a cart, as shown below. The cart will move as if it were acted on by a single force with a magnitude of
50 N
17. A car travels from A to B at a constant 100 km/hr. Which of the following changes?
velocity
11. The distance-time graph shown represents the motion of a laboratory cart. According to the graph, the cart is
moving at a constant speed
37. 338. The diagram below shows a 5 kg block at rest on a horizontal, frictionless table. Which diagram best represents the force exerted on the block by the table?
A. 49.1
A 50 newton horizontal force is needed to keep an object weighing 500 newtons moving at a constant velocity of 2 meters per second across a horizontal surface. The magnitude of the frictional force acting on the object is
50 N
As the car goes around the curve, the centripetal force is directed
toward the center of the circular curve
A different force is applied to each of four 1 kg blocks to slide them across a uniform steel surface at constant speed as shown below. In which diagram is the coefficient of friction between the block and steel smallest?
B
22. The accompanying diagram shows a child pulling a 50 kilogram friend on a sled by applying a 300 newton force on the sled rope at an angle of 40 degrees with the horizontal. The vertical component of the 300 newton force is approximately
190 N
A soccer player kicks a 0.5 kg stationary ball with a force of 50 N. What is the force on the player's foot?
50 N
12. The graph shown represents the relationship between velocity and time for a 2 kilogram cart that is initially at rest and starts moving northward
north
15. The accompanying diagram represents the relationship between velocity and time of travel for four cars, A, B, C, and D, in straight-line motion. Which car has the greatest acceleration during the time interval 10 seconds to 15 seconds?
D
36. A hot air balloon exerts a force of 1200 N while lifting a load of 800 N. Which free-body force diagram depicts the forces involved?
C
8. A steel ball is dropped from a height of 100 meters. Which velocity-time graph best describes the motion of the ball?
C
43. A 75 kg boy initially at rest skis down the slope as shown. Assuming no frictional loss, what will be his kinetic energy at the bottom of the slope?
C
7. Which graph best represents the relationship between the velocity of an object thrown straight upward from Earth's surface and the time that elapses while it is in the air? (Neglect friction)
D
When a 12 newton horizontal force is applied to a box on a horizontal tabletop, the box remains at rest. The force of static friction acting on the box is
12 N
6. Which pair of graph represents the same motion of an object?
A
2. What is the magnitude of the object's total displacement after 8.0 seconds?
0 m
A box is pushed toward the right across a classroom floor. The force of friction on the box is directed toward the
left
25. The accompanying diagram shows a granite block being slid at constant speed across a horizontal concrete floor by a force parallel to the floor. Which pair of quantities could be used to determine the coefficient of friction for the granite on the concrete?
frictional force and normal force on the block
35. Two forces act on the 2 kg box shown below. A 4 N force acts to the right and a 6 N force acts to the left. What is the net force acting on the box?
2 N to the left
19. Four arrows are shot horizontally from the top of a tower, as shown below. Which path represents the arrows with the greatest horizontal velocity?
1
20. The graph below shows the distance a student walks down a hall over time. Use the information shown on the graph to answer the following question(s). During which time interval was the student moving the fastest?
D
42. A pendulum swings as shown in the diagram. At which position is the kinetic energy of the pendulum bob least?
D
In which situation is the net force on the object equal to zero? A. a satellite moving at a constant speed around Earth in a circular orbit B. an automobile braking to a stop C. a bicycle moving at constant speed on a straight, level road D. a pitched baseball being hit by a bat
C
13. The graph shown represents the relationship between distance and time for an object in motion. During which interval is the speed of the object changing?
DE
An object falls freely from rest for three seconds. The acceleration of the object is
10 m/s²
3. Which pair of graphs represent the same motion?
A.
5. A ball is thrown horizontally with an initial velocity of 20 meters per second from the top of a tower 60 meters high. What is the initial vertical velocity of the ball?
0 m/s
The force that holds protons and neutrons together is known as the
strong force
As a pendulum moves from the bottom of its swing to the top of its swing, the
potential energy of the pendulum increases
As an object falls toward the Earth, its gravitational potential energy will
decrease
14. Which pair of graphs represent the same motion?
C
A car travels 300 meters in 15 seconds. What is the average velocity of the car?
20 m/s
As a falling apple approaches the ground, its potential energy
decreases
A red ball and a green ball are simultaneously throw horizontally from the same height. The red ball has an initial speed of 40 meters per second and the green ball has an initial speed of 20 meters per second. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be
the same
45. The diagram here shows a 1 kg stone being dropped from a bridge 100 meters above a gorge. As the stone falls, the gravitational potential energy of the stone
decreases
As a pendulum travels from the highest point of its swing to the lowest point of its swing, its potential energy
decreases
33. A 50 kg child on a skateboard experiences a 75 N force as shown. What is the expected acceleration of the child?
1.50 m/s²
30. The diagram below represents a block at rest on an incline. Which diagram best represents the forces acting on the block?
D
A 100 kg person acquires a velocity of 15 meters per second down a ski slope. What is the skier's kinetic energy?
11250 joules
Section 2
(50 cards)